Reflector for lamps



' REFLECTOR FOR LAMPS Filed Nov. 20, 1955 75'" ATTORNEY.

Patented Aug. 27, 1935 Y 2,012,338

UNITED STATES PATENT OFFICE REFLECTOR FOR LAMPS Friedrich Richard Dietrich, Pasing, near Munich, Germany Application November 2o, 1933, serial No. 698,735 In Germany November 23, 1932 2 Claims. (Cl. 24U-41.35)

The invention relates to parabolic reflectors for beam projected straight ahead by reflector I. lamps for vehicles, room lighting, street light- This construction is suitable for vehicles with a ing and other purposes, its object being to prosingle head lamp, and for bicycle lamps.

vide a reector which projects, in addition to a It is not essential that the parabolic curvature 5 parallel beam in the direction of the main axis, of the deflected portion of the reflector be the 5 deflected beams. same as that of the main portion. Fig. 2 shows a For this purpose rim segments of the reflector construction with two parts 3 having a shorter are outwardly deflected about the focal point of focal length than the main part I. f the parabola. The deflected segments may have The reflector may be made in one piece, by

10 parabolic curvatures differing from that of the means of stamping and appropriate dies. A dif. 10,y

main parabola,v and may be composed of a plufusing glass 5 is mounted on the edge 4 of the rality of bands, deflected to different degrees. It reflector to avoid a dark patch between the beams is generally of advantage to use a dispersive glass directed straight' ahead and to the side. with the reflector, as will be explained herein- What I claim is; 15 after. 1. A reflector consisting of three mutually com- 15 Several examples of reflectors according to the plementary paraboloid longitudinal sections sepinvention are shown in the annexed drawing in arated by parallel, vertical planes, said sections which Figs. 1 and 2 are horizontal longitudinal having a common focal point, and two of said seccross-sections of two embodiments of the inventions being lateral sections deflected outwardly 20 tion. about said focal point. 20

Fig. 1 illustrates a parabolic central refiector 2. A reflector according to claim l, and in which I and two deflected parts 3, at opposite sides of the side portions have a shorter focal length the lamp 2, so that an outwardly deflected beam than the central portion. is projected on both sides in addition to the FRIEDRICH RICHARD DIETRICH. 

